Top similar games like Sentry System:

Idol Keeper is a 3D one-player turn based game where you have to make many strategic choices as you face demon waves, with many random events guarantying hours and hours of unique gaming time.

Galactic Garrison is a sci-fi, turn-based tower defense game where you defend your base from relentless alien waves on Mars. Deploy soldiers, build barricades, and upgrade defenses to withstand attacks. Earn powerful reward cards to gain strategic advantages and outmaneuver your enemies.

Tiny Battles is a tactical action auto-battler where battles take place automatically in the arena. Prologue is a demo version of the Tiny Battles game, where 2 of the 5 factions and 3 of the 15 enemy opponents are available to play.

Tower Dominion is a roguelike tower defense game where you build out the map while defending your stronghold against alien invasion. Choose from 30 heroes, strategically control enemy waves and upgrade a variety of destructive towers to hold the line!

Stellar Watch is a rotating tower defense roguelike where you can adjust turret defenses in real-time by steering them around enemy paths.

Red Sea is an intense Real-time Tactics game where you control a small team of vigilantes in increasingly challenging battles. It features a Scriptable Tactics system that mixes auto-battling with manual overrides and has a ton of powerful ability interactions to discover.

TD Worlds is a dynamic, highly strategical game that challenges your skill. Build an impenetrable defense and get ready to plunge into a new, unknown world to uncover its secrets. Use Twitch integration and play with your viewers.

You are the guardian of a cursed labyrinth and must prevent an adventurer from escaping with the help of your monsters. But the adventurer keeps trying again and again, accumulating levels and getting stronger... Survive to the highest possible level !

Tau Cubis is a mazing tower defense game set in colorful sci-fi landscapes. Are you ready to take on the challenge and fend off onslaughts of relentless robots ?

A Rogue-like Tower Defense game with 10 towers, 5 damage types, 20 abilities, and hundreds of upgrades. Select one or more upgrades to your towers and/or abilities at the end of each level that stay with you through your mission to protect the Xenocrystals. Limitless possibilities!

Co-op and Single player Tower Defense genre.

Defend Billy and his crew on their way to the extraction zone! You have been authorized to use the defense system. Protect them from giant bugs, malfunctioning droids and more...

Axon TD lets you expand the map boundaries themselves. A huge arsenal of towers and a wide variety of enemies clash in a battlefield that grows to your whims. Engage in single, cooperative, and roguelite gameplay.

You wake up in a gloomy room. Become the test subject of a shady software program that feeds on Tower Defense - Roguelike - Deckbuilder simulations.

Play an auto battler, a traditional roguelike or a tower defense and experience the world of Grandura. Reuse what you've learned about the creatures, abilities and items that are found in this world and apply them in different game modes.

Flaregate Network is a roguelike deckbuilder with RTS-inspired spaceship combat. Build a unique deck, then pilot it—and your fleet—to victory!

Button Pop is a 3D Tower defense game fused with Button mashing chaos. Construct the deadliest defense strategies by unlocking powerful traps and turrets across a variety of terrains, while building your very own button with the rewards of your adventures!

Undead army fills the world, and we are trapped in the cave of an ancient god. Roguelike strategic defense! Use your resources wisely, lead your soldiers, and unite the survivors. Ultimately, turn your cave into a fortress capable of defeating the undead king. The fate of the world is in your hands.

A minimalist sci-fi tower defense. Buy soldiers and upgrade them, defeat waves of enemies, hold your lines.

Kingdom Loop is a strategic roguelike autobattler focused on building your army and kingdom. Explore many tile combinations, items, and units in search of the perfect setup to beat the Ancient Kings!

Unleash your creativity and strategic vision to shape enemy paths, build deadly mazes, and dominate the battlefield in this casual tower defense.

An auto battler roguelike that fuses modern design with nostalgic 90s-style visuals. Collect 3 copies of a unit to level them up. Match traits to power up your whole team. A massive content pool enables a large variety of builds.

Defend the evacuation of Terra on the losing side of an alien invasion. This experimental action strategy game breaks out of genre norms to provide fresh mechanics to strategic gaming.

Engineered to Purpose is a new tower defence game where you custom-design towers to defend your base, with millions of builds to explore and refine. Set in the far future, E2P's story of posthumanism, family, and change will open new worlds to explore and survive.

Do you like Tower Defense games with Strategy elements? Well, look no further! We've got exactly what you're looking for! Get ready to defend your settlement from enemies using a huge arsenal of towers!

Gear up and get going! Defend your outposts from waves of alien enemies with your mech. Build and upgrade your base, protecting the extraction of the mysterious planetary system’s rich resources!

Cosmic Raze is a sci-fi tower defense strategy game. Control advanced weapons, build powerful synergies, and then blast away as aliens attempt to conquer Earth. Between rounds you'll earn unique augmentations, purchase and upgrade a huge variety of weapons, and unlock powerful synergy bonuses.

Tower Defense with resource- and base management! Waves of enemy robots with special abilities, shield and armor! Mining, refining and production for building and repairing! Environmental hazards and the best: the Orbital strike!

Humans are ruining the lush world of Terra Inferno! Embody nature's wrath in this Turn-Based Tactics meets Resource Management Game, evoke natural calamities to devastate the human onslaught!

Become a fearless protector and control a versatile melee-construction unit to build your defense and safeguard humanity's future from endless vermin swarms!

Hallway Defender is a roguelite tower defense where you defend your base from an endless wave of fellow classmates. With over 25 different towers and even more upgrades and effects there are infinite ways to set up your own defenses.

Play a 4x game in 40 minutes... or less! We streamlined 4x strategy down to a game that captures the fun in a manageable play time. Lead your faction against escalating enemies and expand the reach of your empire. Multiple paths to victory allows for a variety of strategies. Build your empire.

TAVU is a PvE RTS game with a tactical combat system. Build your bases and defend them against waves of enemy attacks. Upgrade your units and destroy enemy bases to gain new territories and resources.

A strategic tower defense roguelike game with a grid-based building system and constantly changing enemy paths and environments. Manage your builders efficiently to defend your base against a variety of enemies. Adaptiveness is the key to winning - do you have what it takes?

Level up, find perfect item combinations, mow down hordes of slimes or fail trying! Slime Siege is a vibrant tower defense with rogue-lite elements. Strategize and create unique item builds for every map to endure the onslaught. How long can you survive?

Manage your lims to fight through the ring and reach the king. A sci-fi robot management game. Position your lims around your lam to fight through groups of enemies. Research, craft, and manage to succeed.